Cable head and method of construction



June 9, 1936. G. F. TURECHEK 2,043,341

CABLE HEAD AND METHOD OF CONSTRUCTION File@ Aug. 2o, 19:54

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Patented .lune 9, 1936 PATENT OFFICE CABLE HEAD' AND METHOD OFCONSTRUCTION George F. Turech'ek, Los Angeles, Calif., assgnor to TheyTechnicraft Engineering Corp., Los Angeles, Calif., a corporation oiCalifornia Application August 20, 1934, Serial No. 740,670

4 Claims. (Cl. 17d-353) My invention relates to'Cable heads and methodof construction, and the objects of my invention are:

First, to provide a cable head which is particularly designed forsupporting and condlrcting cables such as used in conjunction withelectrically operated oil well tools;

Second, to provide a cable head which is adapted to withstand greatexternal hydrostatic pressure without leaking or otherwise giving way;

Third, to provide a cable head wherein all tensional strain onthe'conductor is eliminated;

Fourth, to provide a cable head wherein all spaces may be readily andcompletely i'illed with solid or semi-solid substance to eliminate allair space which might permit the cable to yield to the externalpressures encountered when the cable head is submerged to great depths;

Fifth, to provide a novel method of constructing cable heads whereby amolten substance may be poured around the weight supporting lay of thecable without damaging the central conductor core; and

Sixth, to provide on the whole a novel cable head which is simple ofconstruction proportional to its functions, durable, and which willwith- 'stand continued use under adverse conditions withoutdeterioration.

With the above and other objects in View as may appear hereinafter,reference is made to the accompanying drawing, in which:

Figure 1 is a partial elevational, partial sectional view of .my cablehead; Fig. 2 is an enlarged transverse sectional view through 2-2 ofFig. l; and Fig. 3 is a fragmentary, enlarged sectional view of thecable head in the process of construction. v

The cable, designated l, comprises an outer, multi-stranded weightsupporting lay la, a centrally disposed conductor lb, separated from theweightA supporting lay la by insulation le, the insulator and conductorforming a core. vThe cable is extended through the bore of a sleeve 2.The bore is flared at its extremities as indicated by 2a, and 2b.

Near one end the sleeve is externally threaded to iit into a shell orcylinder 3. In assembling the cable head, the cable is pulled throughthe.

sleeve a short distance and the strands of the weight supporting laypeeled back; whereupon an additional wrapping, designated 4, of insula-The strands of the weight 'supporting lay are then partially rearranged,and their extremities are bent outwardly into hook portions ld.

When the sleeve and cylinder are connected, the cable appears as shownin Fig. 3. Asbestos 5 or other suitable heat insulating material is thenapplied around the bases of the hook portions and into the flared end 2bof the sleeve. A- 5 protector 6 is fitted over the end of the core andagainst the asbestos 5.' Said protector is in the form of a sleeve witha frusto conical inner end and an internally threaded outer end. Theouter end of the protector temporarily receives a tube 10 1. When theparts are arranged as shown in Fig. 3, molten metal of a comparativelylow meltf ing point, such as zinc, is poured around the hook portions Idto form a plug 8 as shown in Fig. 1, which not only secures the cablebut also grounds the same to the cylinder. The metal is poured until itslevel is just below the top of the protector 6 and when the metal plugis hardened, thetube 'l is removed. The normally lower end oi thecylinder 3 is 20 externally threaded to screw into a suitable tool, andis internally threaded and enlarged slightly to receive a partitionmember 9 of insulating material, and a nipple l0 to secure the partitionmember. 'Ihe partition member 9 carries a ter- 25 minal screw l l, theinner end of which is secured to the conductor lb. Sufficient slack isprovided in the core to permit this connection. The space between thepartition member and the plug 8 is filled with a suitable insulatingcompound l2, said compound being heated until melted and poured into thechamber before insertion of the partition member.

the cable.

I claimz- 1. A head for conductor core wire ropes, comprising; anelongated wire rope receiving sleeve: an elongated shell adapted to bescrew threaded upon an end of the sleeve to form an enlargedcontinuation thereof; an anchoring plug arranged to receive the strandsof the wire rope and including a central bore loosely receiving saidcore; an insulating and sealing partition; a terminal means sealedtherein arranged to be electrically connected with the extremity ofthecore; means fora-securing said partition at the extremity o1' saidshell, said shell forming between the partition-and anchoring plug achamber adapted to permit looping of said core therein; and aninsulatirlg and sealing compound completely lling said chamber.

2. The method oi' securing cable heads to conductor core wire ropes,characterized by; :traying an end oi' the weight supporting strands ofthe rope to form anchor means; positioning a permanent casing so as toshield the portion of the core within the anchor means and positioning atemporary casing so as .to shield the extended portion of said core;arranging the anchormeans, core and casings in a cable head; pouringwhile in a molten state a metallic plug in and around said anchor meansand around the permanent casing; and removing the temporary casing.

3. The method of securing cable heads to conductor core wire ropes,characterized by: iraying an end of the Weight'supporting strands o thevtremity of the core to a terminal and insulated sealing partitionpouring an insulating compound in the extended portion of the cablehead; imbedding the excess core in said compound and securing saidpartition thereagainst whereby the compound completely illls the spacebetween said plug and said partition.

4. In a head for wire ropes having a conductor core and a strandedsheathing: an elongated head structurehaving a constricted sleeveportion arranged to receive a wire rope and an enlarged shell portionarranged to receive the extremity of the wire rope; an anchoring plug insaid shell coactingv with the extremities of the stranded sheathing tosecure the wire rope relative to said head structure, and having acentral bore loosely receiving said core; an insulating and sealingpartition; a terminal means sealed therein arranged to be electricallyconnected with the extremity of the core; means for securing saidpartition atthe extremity of said shell, said shell forming between thepartition and anchoring plug a chamber adapted to permit looping oi saidcore therein and an insulating and sealing compound completely llingsaid chamber. l

GEORGE F. TURECHEK.

